Catching a criminal is one of those many roles of a police officer. They are doing their job well in order to maintain peace and order. Here you will have a different kind of police games you will experience. As an officer in this game your duty is to catch all the aliens that want to take this world from us. You have to capture every single alien using a hi-tech air patrol. The more alien you catch the more points you can have. So do not let them pass thru this desert. You should quickly get them all in order to save the world.